Pick-and-place device for glass substrate

ABSTRACT

A pick-and-place device for a glass substrate is provided. The pick-and-place device has a loading bracket for loading the glass substrate, at least one first stopper immovably disposed on the loading bracket, and a plurality of second stoppers movably disposed on the loading bracket. The first stopper is used for a datum orientation with the glass substrate; and the second stopper is used to fix the glass substrate. Therefore, the shifting deviation risk of the glass substrate is decreased, and it can reduce the broken risk of the glass substrate, so as to lower the production cost.

FIELD OF THE INVENTION

The present invention relates to the technical field of liquid crystaldisplays, and more particularly to a pick-and-place device for a glasssubstrate.

BACKGROUND OF THE INVENTION

In the manufacture of liquid crystal displays, it is necessary totransfer a glass substrate from a cassette to a production line, andexecute a wanted manufacture process. Furthermore, in the transferprocess, the glass substrate loaded in the cassette is picked from thecassette for a sampling inspection, and then is placed back to thecassette after it is qualified by the sampling inspection.

However, generally speaking, the glass substrate is usually 0.4-0.7 mmin thickness, and is fragile, so that the glass substrate is easilybroken in the loading or unloading process thereof. If the placedposition of the glass substrate on the cassette is incorrect, then theglass substrate is more easily broken when it is loaded/unloaded fromthe cassette. Referring now to FIGS. 1 a to 1 d, which show severalincorrect placement situations of a glass substrate on a cassette,wherein FIG. 1 a is a schematic view showing a glass substrate which isslanted to the left side; FIG. 1 b is a schematic view showing a glasssubstrate which is slanted to the right side; FIG. 1 c is a schematicview showing a glass substrate which is slanted to the outside; and FIG.1 d is a schematic view showing a glass substrate which is slanted androtated. Additionally, some problems, such as shaking and unstableairflow, easily happen during the transfer process, which can cause theglass substrate to be dropped and broken. That is, in the traditionaltechnology, since the placement precision of the glass substrate is low,the glass substrate is easily broken when it is picked/placed, and costsare increased.

As a result, it is necessary to provide a pick-and-place device for aglass substrate to solve the above-mentioned problems.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a pick-and-placedevice for a glass substrate, which can decrease the shifting deviationrisk of the glass substrate, and reduce the broken risk of the glasssubstrate, so as to lower production cost.

For solving the above-mentioned problems, the technical solution ofpreferred embodiments of the present invention is as follows:

A pick-and-place device for glass substrate, comprising: a base bracket;a loading part disposed on the base bracket; wherein the loading partcomprises: a loading bracket; at least one first stopper immovablydisposed on the loading bracket; and a plurality of second stoppersmovably disposed on the loading bracket, wherein a telescopic structureis disposed on the second stoppers;

wherein the quantity of the first stoppers and the second stoppers is atleast four; the loading bracket is used to load the glass substrate; thefirst stopper is used for a datum orientation with the glass substrateon the loading bracket; and the second stoppers are used to fix theglass substrate on the loading bracket by the telescopic structureextending or retracting and moving on the loading bracket.

In the above-mentioned pick-and-place device for the glass substrate,the loading bracket is provided with a plurality of air cushions, andthe air cushions are used to suck and fix the glass substrate whenpicking or placing the glass substrate.

In the above-mentioned pick-and-place device for the glass substrate,the air cushions are further used to form an air suspension between theglass substrate and the loading bracket when the second stoppers move onthe loading bracket.

In the above-mentioned pick-and-place device for the glass substrate,the loading bracket is arranged as two loading arms, and one end of eachof the two loading arms close to the base bracket is provided with oneof the first stoppers, and the other end thereof is correspondinglyprovided with one of the second stoppers.

In the above-mentioned pick-and-place device for the glass substrate,the second stoppers disposed on the corresponding end opposite to thefirst stoppers are used to fix the glass substrate on the loading armsby a movement in a parallel direction of the loading arms.

In the above-mentioned pick-and-place device for the glass substrate,both of the two loading arm are provided with the air cushions, and theair cushions are equidistantly disposed between the first stopper andthe second stopper corresponding to the first stopper.

In the above-mentioned pick-and-place device for the glass substrate,each side of the two loading arms close to the left or right edges ofthe glass substrate is correspondingly provided with the secondstoppers.

In the above-mentioned pick-and-place device for the glass substrate,the second stoppers disposed on the side edges of the loading arms areused to fix the glass substrate on the loading arms by a movement in aperpendicular direction to that of the loading arms.

In the above-mentioned pick-and-place device for the glass substrate,when each side of the two loading arms is provided with one of thesecond stoppers, the second stoppers are disposed on the middle of thefirst stopper and the second stopper corresponding to the first stopper.

In the above-mentioned pick-and-place device for the glass substrate,when each sides of the two loading arms is provided with at least two ofthe second stoppers, the second stoppers are equidistantly disposedbetween the first stopper and the second stopper corresponding to thefirst stopper.

A pick-and-place device for a glass substrate, comprising: a basebracket; a loading part disposed on the base bracket; wherein theloading part comprises: a loading bracket; at least one first stopperimmovably disposed on the loading bracket; and plurality of secondstoppers movably disposed on the loading bracket;

wherein the quantity of the first stoppers and the second stoppers is atleast four; the loading bracket is used to load the glass substrate; thefirst stopper is used for a datum orientation with the glass substrateon the loading bracket; and the second stoppers are used to fix theglass substrate on the loading bracket by the second stoppers moving onthe loading bracket.

In the above-mentioned pick-and-place device for the glass substrate,the loading bracket is provided with a plurality of air cushions, andthe air cushions are used to suck and fix the glass substrate whenpicking or placing the glass substrate.

In the above-mentioned pick-and-place device for the glass substrate,the air cushions are further used to form an air suspension between theglass substrate and the loading bracket when the second stoppers move onthe loading bracket.

In the above-mentioned pick-and-place device for the glass substrate,the loading bracket is arranged as two loading arms, and one end of eachof the two loading arms close to the base bracket is provided with oneof the first stoppers, and the other end thereof is correspondinglyprovided with one of the second stoppers.

In the above-mentioned pick-and-place device for the glass substrate,the second stoppers disposed on the corresponding end opposite to thefirst stoppers are used to fix the glass substrate on the loading armsby a movement in a parallel direction of the loading arms.

In the above-mentioned pick-and-place device for the glass substrate,both of the two loading arm are provided with the air cushions, and theair cushions are equidistantly disposed between the first stopper andthe second stopper corresponding to the first stopper.

In the above-mentioned pick-and-place device for the glass substrate,each side of the two loading arms close to the left or right edges ofthe glass substrate is correspondingly provided with the secondstoppers.

In the above-mentioned pick-and-place device for the glass substrate,the second stoppers disposed on the side edges of the loading arms areused to fix the glass substrate on the loading arms by a movement in aperpendicular direction to that of the loading arms.

In the above-mentioned pick-and-place device for the glass substrate,when each side of the two loading arms is provided with one of thesecond stoppers, the second stoppers are disposed on the middle of thefirst stopper and the second stopper corresponding to the first stopper.

In the above-mentioned pick-and-place device for the glass substrate,when each sides of the two loading arms is provided with at least two ofthe second stoppers, the second stoppers are equidistantly disposedbetween the first stopper and the second stopper corresponding to thefirst stopper.

Hence, compared with the existing technology, in the pick-and-placedevice for the glass substrate of the present invention, the firststopper and the second stopper are added for adjusting the glasssubstrate, and it is possible to first confirm a position of the glasssubstrate on the loading arms, and then turn on the vacuum. Therefore,the risk of shifting deviation of the glass substrate is decreased, andthe broken risk of the glass substrate is reduced, thereby lowering thecost.

Below, with reference to the accompanying drawings, the specificembodiments of the present invention are further described, so thataspects of the present invention and the beneficial effects thereof aremore clearly defined.

DESCRIPTION OF THE DRAWINGS

FIGS. 1 a to 1 d are schematic views showing incorrect placements of aglass substrate in a cassette;

FIG. 2 is a structural schematic view of a pick-and-place device for aglass substrate of the present invention;

FIG. 3 is a structural schematic view of another pick-and-place devicefor a glass substrate of the present invention;

FIG. 4 is a schematic side view of the pick-and-place device for theglass substrate of the present invention;

FIG. 5 is another schematic side view of the pick-and-place device forthe glass substrate of the present invention;

FIG. 6 is a structural schematic view of a second stopper of the presentinvention; and

FIG. 7 is another structural schematic view of the second stopper of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to the drawings, wherein the same symbols representing likecomponents are used to represent the principles of the present inventionimplemented in a suitable computing environment as examples. Thefollowing description is based on the specific illustrated embodiment ofthe present invention, which should not be construed as limiting theunillustrated embodiment of the present invention.

Referring now to FIG. 2, which is a structural schematic view of apick-and-place device for a glass substrate of the present invention,wherein the pick-and-place device for a glass substrate comprises: abase bracket 10 and a loading part 11 disposed on the base bracket 10.

The loading part 11 comprises a loading bracket 110 and a plurality offirst and second stoppers, wherein the first stopper 111 is immovablydisposed on the loading bracket 110; the second stopper 112 is movablydisposed on the loading bracket 110; and the quantity of the firststoppers 111 and the second stoppers 112 is at least four.

Moreover, the loading bracket 110 is used to load a glass substrate 12.The first stopper 111 is used for a datum orientation with the glasssubstrate 12 on the loading bracket 110.

The second stopper 112 is used to fix the glass substrate 12 on theloading bracket 110 by moving on the loading bracket 110.

It should be understood that the stoppers disposed on the loadingbracket 110 comprise the first stopper 111 and the second stopper 112,and the quantity of the first stoppers 111 and the second stoppers 112is at least four. Preferably, as shown in FIG. 2, the stoppers can bedisposed on the four edges of the loading bracket 110, and in the atleast four stoppers, at least one of the first stoppers 111 is included.

Preferably, as shown in FIG. 2, each of the edges of the loading bracket110 is provided with one stopper, wherein one end of each of the firststoppers 111 is disposed on the edge closest to the base bracket 10, andthree of the second stoppers 112 are disposed on the other edges of theloading bracket 110.

After the glass substrate 12 is placed on the loading bracket 110, theglass substrate 12 can be orientated based on the first stopper 111, andthen the second stoppers 112 can be moved toward the glass substrate 12,namely inward, so as to fix the glass substrate 12 on the loadingbracket 110. Conversely, if the glass substrate 12 is to be picked fromthe loading bracket 110, the second stopper 112 can be moved far awayfrom the glass substrate 12, namely outward, so as to achieve unloadingthe glass substrate 12. In FIG. 2, there are arrows indicating themovement directions of the second stoppers 112.

Preferably, as shown in FIG. 2, the loading bracket 110 is provided witha plurality of air cushions 114, and the air cushions 114 are used tosuck and fix the glass substrate 12 when picking/placing the glasssubstrate 12. That is, the air cushions 114 are used to be vacuum padswhen picking/placing the glass substrate 12. The glass substrate 12 canbe fixed by the sucking function of the vacuum pads before it is fixedby the stoppers, so as to avoid the glass substrate 12 being dropped.

Furthermore, preferably, the air cushions 114 are used to form an airsuspension between the glass substrate 12 and the loading bracket 110when the second stoppers 112 move onto the loading bracket 110. Thesecond stoppers 112 are moved on the loading bracket 110, and thereby itis possible to drive the glass substrate 12 to be moved togethertherewith, so that in this moment, the sucking function thereof turnedoff, and are used as air suspension cushions. That is, by a thin airlayer formed between the air suspension cushions and plane, thethickness of the thin air layer is 1 mm or less, and a sliding conditionof non-friction is established, so as to avoid the glass substrate 12being scratched.

Preferably, in order to save the cost of the loading bracket 110, theloading bracket 110 can be arranged as two loading arms. Referring nowto FIG. 3, which is a structural schematic view of anotherpick-and-place device for a glass substrate of the present invention.

Preferably, a loading bracket 110 is arranged as two loading arms,wherein each end of the two loading arms close to the base bracket 10 isprovided with one of the first stoppers 111, and the other end thereofis correspondingly provided with one of the second stoppers 112.Furthermore, each side of the two loading arms close to the edges of theglass substrate 12 is correspondingly provided with the second stoppers112. As shown in FIG. 2, each outer side of the two loading arms isprovided with two of the second stoppers 112.

Referring now to FIGS. 4 and 5, which are schematic side views of thepick-and-place device for a glass in FIG. 3.

Preferably, the profile of the second stoppers 112 can be formed as anL-shape, wherein the end of the long side thereof is connected with theloading arm. Simultaneously, referring to FIG. 2, the long side thereofis perpendicular to the loading arm.

Furthermore, the long side of the second stoppers 112 is provided with atelescope structure.

When the long side of the second stoppers 112 is telescopically moved bythe telescope structure, a short side of the second stoppers 112 ismoved alone the moving direction of the telescope structure. As shown inFIG. 3, before the glass substrate 12 is placed on the loading arms, thetelescope structure of the second stoppers 112 and the short sideconnected therewith are extended outwards. As shown in FIG. 4, after theglass substrate 12 is placed on the loading arms, the telescopestructure of the second stoppers 112 and the short side connectedtherewith are retracted inwards until the short side of the secondstopper 112 contacts the glass substrate 12. In FIGS. 3 and 4, there arearrows indicating the moving directions of the second stoppers 112.

That is, the second stoppers 112 disposed on the corresponding endopposite to the first stopper 111 are used to fix the glass substrate 12on the loading arms by a movement in a parallel direction to that of theloading arms; and the second stoppers 112 disposed on the side edges ofthe loading arms are used to fix the glass substrate 12 on the loadingarms by a movement in a perpendicular direction to that of the loadingarms.

It is necessary to explain that the profiles of the second stoppers 112in the preferred embodiments of the present invention can be anon-standard L-shape. For example, an oblique angle can be between thelong side and short side (they can be connected with a non-right angle),or a stopping block can disposed on the end of the short side to furtheravoid the glass substrate 12 being dropped, and the above-mentionedshapes do not influence the function of the second stoppers 112.

It is easily understood that since FIGS. 3 and 4 show a single secondstopper 112, all of the second stoppers 112 disposed on thecorresponding end opposite to the first stopper 111 or on the left sideedges of the loading arms can be in the same installation, this is notdiscussed here.

Specifically, the telescope structure disposed inside the long side ofthe second stoppers 112 can be installed such as below structures, so asto achieve a movement of the second stoppers 112.

Referring now to FIG. 6, which is a structural schematic view of atelescopic structure, wherein the numeral 115 indicates the telescopicstructure. The telescopic structure 115 is disposed inside the long sideof the second stoppers 112, and is formed as a screw thread.Furthermore, the internal part of the long side of the second stoppers112 is also formed as a screw thread co-operating with the telescopicstructure 115.

By using an external tool, such as a wrench, to drive the telescopicstructure 115, the telescopic structure 115 can be rotated and movedinside the long side under external force, thereby driving the shortside of the second stoppers 112 to be moved. In FIG. 6, there is anarrow indicating the movement directions of the telescopic structure115.

Referring now to FIG. 7, which is another structural schematic view of atelescopic structure, wherein the numeral 116 indicates the telescopicstructure. The telescopic structure 116 is disposed inside the long sideof the second stoppers 112, wherein the long side is provided with alevel guide slot 117, and the telescopic structure 116 is provided witha sliding pin 118, so that the sliding pin 118 can slide in the levelguide slot 117.

By the sliding pin 118 co-operating with the level guide slot 117, thetelescopic structure 116 can be moved under the limit of the sliding pin118, and drive the short side of the second stoppers 112 to be moved. InFIG. 7, there is an arrow indicating the movement directions of thetelescopic structure 115.

When the telescopic structure 116 arrives at the user's desiredposition, a fastener can be used to fix the telescopic structure 116,such as pull fastener or clip fastener; it is not specifically limitedherein.

It is easily understood by the displace principle that it is possible todispose the level guide slot 117 on the telescopic structure 116, andthe sliding pin 118 on the long side of the second stoppers 112. Theoperation principle thereof can be referred to the above description; itis not specifically described here.

It should be understood that FIGS. 6 and 7 are only used to explain thepreferred embodiments, but not be a limit to the present invention.

As shown in FIG. 3, both of the two loading arm are provided with theair cushions 114, and the air cushions 114 are equidistantly disposedbetween the first stopper 111 and the second stopper 112 correspondingto the first stopper 111. In the preferred embodiment, each of theloading arm is provided with three of the air cushions 114, but thenumber thereof is not limited here.

Furthermore, the number of the second stoppers 112 of the loadingbracket 110 is dependent upon the size of the glass substrate. For aloaded glass substrate of G3.5, each of the left and right sides of thetwo loading arms is provided with one of the second stoppers 112,wherein the second stopper 112 is disposed in the middle of the firststopper 111 and the second stopper 112 corresponding to the firststopper 111.

For a loaded glass substrate of G5 or more, each of the left and rightsides of the two loading arms is provided with at least two of thesecond stoppers 112, wherein the second stopper 112 is equidistantlydisposed between the first stopper 111 and the second stopper 112corresponding to the first stopper 111.

For better achieving the pick-and-place device for glass substrate ofthe present invention, according to the pick-and-place device for theglass substrate shown in FIG. 3, a pick-and-place method for a glasssubstrate is simply explained as follows:

In the first step, the loading arm picks the glass substrate from acassette/machine; to prevent the glass substrate from sliding when theloading arms are moved, the air cushions 114 are turned on to a vacuumfunction to fix the glass substrate.

In the second step, when the loading arms arrives at a target position,the air cushions 114 are turned off from the vacuum function and changedto an air suspension function, and then the glass substrate is adjustedand oriented by the first stopper 111 and the second stoppers 112.

Third step, when the adjustment is finished and the second stoppers 112do not depart from the glass substrate, the air cushions 114 are turnedon to the vacuum function to fix the glass substrate again.

In the fourth step, after turning on the vacuum function, the secondstoppers 112 are loosened and return to an original position, so thatthe pick/place operation of the loading arms is finished.

As mentioned above, the pick-and-place device for glass substrate of thepresent invention can improve a shifting deviation thereof. If theloading arms are not provided with an adjustment structure (the firststopper 111 and the second stoppers 112), then the deviation ofpicking/placing glass substrate is between 1 mm to 2 mm. The reasonthereof is that the glass substrate has a moving risk if the vacuumfunction of the loading arms is not turned on while packing the glasssubstrate. In the present invention, since the first stopper 111 and thesecond stoppers 112 are added for adjusting the glass substrate, it ispossible to first confirm a position of the glass substrate on theloading arms, and then turn on the vacuum. Therefore, the shiftingdeviation risk of the glass substrate is decreased, and it can reducethe broken risk of the glass substrate, so as to lower the costs.

In the above embodiments, the description of the various embodiments hasfocused on a certain embodiment is not described in detail section, youcan see the relevant description in other embodiments, not mentionedhere.

Those skilled in the art will recognize that, with reference to thewords used herein, “preferably” means serving as an example, a sample,or an illustration. Text described as “preferred” any aspect or designnecessarily to be construed as advantageous over other aspects ordesigns. In contrast, the term “preferred”, is meant in particular theway the concept. As used herein, the term “or” is intended to meancontaining “or” not exclude “or.” That is, unless specified otherwise,or clear from the context, “X employs 101 or 102” means an arrangementof any nature, including. That is, if X employs 101; X employs 102; or Xemploys both 101 and 102, then “X employs 101 or 102” is met in any ofthe foregoing examples.

Moreover, despite being relative to one or more implementations shownand described the present disclosure, those skilled in the art based onthe present specification and drawings will occur upon reading andunderstanding the equivalent variations and modifications. The presentdisclosure includes all such modifications and variations, and is onlylimited by the scope of the appended claims. Particularly, with regardto the various functions performed by the above-described components(e.g., elements, resources, etc.), the terms used to describe suchcomponents are intended to perform the function corresponding to thespecified component (e.g., which is functionally equivalent) of any ofthe components (unless otherwise indicated), even if the structure ofthe implementation and execution of the function of the presentdisclosure shown herein disclosed exemplary not structurally equivalent.Additionally, although a particular feature of the present disclosurehas been made with respect to certain implementations, only one is open,but this feature may be as given or particular application and thepurpose of enabling a desired one or more other implementations Othercombinations of features. Moreover, the terms “comprising,”, “having,”,“containing,” or variants thereof are used in the detailed descriptionor the claims, such a term is intended to be used in a manner similar tothe term “comprising”

Although the present invention has been disclosed in the preferredembodiments described above, the foregoing preferred embodiments are notintended to limit the present invention. One of ordinary skill in theart, without departing from the spirit and scope of the presentinvention within, may implement various modifications and variations, sothe scope of the protection of the invention as defined in the claimswill prevail.

What is claimed is:
 1. A pick-and-place device for a glass substrate,comprising: a base bracket; a loading part disposed on the base bracket;wherein the loading part comprises: a loading bracket; at least onefirst stopper immovably disposed on the loading bracket; and a pluralityof second stoppers movably disposed on the loading bracket, wherein atelescopic structure is disposed on the second stoppers; wherein thequantity of the first stoppers and the second stoppers is at least four;the loading bracket is used to load the glass substrate; the firststopper is used for a datum orientation with the glass substrate on theloading bracket; and the second stoppers are used to fix the glasssubstrate on the loading bracket by the telescopic structure extendingor retracting on the loading bracket.
 2. The pick-and-place device forthe glass substrate according to claim 1, wherein the loading bracket isprovided with a plurality of air cushions, and the air cushions are usedto suck and fix the glass substrate when picking or placing the glasssubstrate.
 3. The pick-and-place device for the glass substrateaccording to claim 2, wherein the air cushions are further used to forman air suspension between the glass substrate and the loading bracketwhen the second stoppers move on the loading bracket.
 4. Thepick-and-place device for the glass substrate according to claim 1,wherein the loading bracket is arranged as two loading arms, and one endof each of the two loading arms close to the base bracket is providedwith one of the first stoppers, and the other end thereof iscorrespondingly provided with one of the second stoppers.
 5. Thepick-and-place device for the glass substrate according to claim 4,wherein the second stoppers disposed on the corresponding end oppositeto the first stoppers are used to fix the glass substrate on the loadingarms by a movement in a parallel direction of the loading arms.
 6. Thepick-and-place device for the glass substrate according to claim 4,wherein both of the two loading arm are provided with the air cushions,and the air cushions are equidistantly disposed between the firststopper and the second stopper corresponding to the first stopper. 7.The pick-and-place device for the glass substrate according to claim 4,wherein each side of the two loading arms close to the left or rightedges of the glass substrate is correspondingly provided with the secondstoppers.
 8. The pick-and-place device for the glass substrate accordingto claim 7, wherein the second stoppers disposed on the side edges ofthe loading arms are used to fix the glass substrate on the loading armsby a movement in a perpendicular direction to that of the loading arms.9. The pick-and-place device for the glass substrate according to claim5, wherein when each side of the two loading arms is provided with oneof the second stoppers, which is disposed on the middle of the firststopper and the second stopper corresponding to the first stopper. 10.The pick-and-place device for the glass substrate according to claim 5,wherein when each sides of the two loading arms is provided with atleast two of the second stoppers, the second stoppers are equidistantlydisposed between the first stopper and the second stopper correspondingto the first stopper.
 11. A pick-and-place device for a glass substrate,comprising: a base bracket; a loading part disposed on the base bracket;wherein the loading part comprises: a loading bracket; at least onefirst stopper immovably disposed on the loading bracket; and a pluralityof second stoppers movably disposed on the loading bracket; wherein thequantity of the first stoppers and the second stoppers is at least four;the loading bracket is used to load the glass substrate; the firststopper is used for a datum orientation with the glass substrate on theloading bracket; and the second stoppers are used to fix the glasssubstrate on the loading bracket by the second stoppers moving on theloading bracket.
 12. The pick-and-place device for the glass substrateaccording to claim 11, wherein the loading bracket is provided with aplurality of air cushions, and the air cushions are used to suck and fixthe glass substrate when picking or placing the glass substrate.
 13. Thepick-and-place device for the glass substrate according to claim 12,wherein the air cushions are further used to form an air suspensionbetween the glass substrate and the loading bracket when the secondstoppers move on the loading bracket.
 14. The pick-and-place device forthe glass substrate according to claim 11, wherein the loading bracketis arranged as two loading arms, and one end of each of the two loadingarms close to the base bracket is provided with one of the firststoppers, and the other end thereof is correspondingly provided with oneof the second stoppers.
 15. The pick-and-place device for the glasssubstrate according to claim 14, wherein the second stoppers disposed onthe corresponding end opposite to the first stoppers are used to fix theglass substrate on the loading arms by a movement in a paralleldirection of the loading arms.
 16. The pick-and-place device for theglass substrate according to claim 14, wherein both of the two loadingarm are provided with the air cushions, and the air cushions areequidistantly disposed between the first stopper and the second stoppercorresponding to the first stopper.
 17. The pick-and-place device forthe glass substrate according to claim 14, wherein each side of the twoloading arms close to the left or right edges of the glass substrate iscorrespondingly provided with the second stoppers.
 18. Thepick-and-place device for the glass substrate according to claim 17,wherein the second stoppers disposed on the side edges of the loadingarms are used to fix the glass substrate on the loading arms by amovement in a perpendicular direction to that of the loading arms. 19.The pick-and-place device for the glass substrate according to claim 15,wherein when each side of the two loading arms is provided with one ofthe second stoppers, the second stoppers are disposed on the middle ofthe first stopper and the second stopper corresponding to the firststopper.
 20. The pick-and-place device for the glass substrate accordingto claim 15, wherein when each sides of the two loading arms is providedwith at least two of the second stoppers, the second stoppers areequidistantly disposed between the first stopper and the second stoppercorresponding to the first stopper.